TY - JOUR
T1 - Spectroscopic measurements of impurity ion toroidal and poloidal flow velocities and their dependence on vertical magnetic field in QUEST toroidal ECR plasmas
AU - Yoneda, Nao
AU - Shikama, Taiichi
AU - Zushi, Hideki
AU - Hanada, Kazuaki
AU - Fujikawa, Akinobu
AU - Onchi, Takumi
AU - Kuroda, Kengoh
AU - Nii, Kuniaki
AU - Hasuo, Masahiro
AU - Hasegawa, Makoto
AU - Idei, Hiroshi
AU - Nakamura, Kazuo
AU - Nagashima, Yoshihiko
AU - Higashijima, Aki
AU - Nagata, Takahiro
N1 - Funding Information:
This work was supported in part by NIFS collaborative research program NIFS16KUTR114 and by collaborative research program of RIAM, Kyushu University 28FP-3.
Publisher Copyright:
© 2019 The Japan Society of Plasma.
PY - 2018
Y1 - 2018
N2 - Toroidal electron cyclotron resonance (ECR) plasma is an ECR heated plasma in an open toroidal magnetic field. The plasma contains no toroidal current and is used for the pre-ionization and non-inductive startup of a tokamak plasma. To obtain a deeper understanding of the basic properties of the plasmas produced in the spherical tokamak QUEST (Q-shu University Experiment with steady-state Spherical Tokamak), we have developed an optical emission spectroscopy system with multiple viewing chords and have used it to measure the spatial distributions of the toroidal and poloidal flow velocities of C2+ ions. We compare the measured velocities with those calculated from the ion drift equations using the plasma parameters reported for a similar spherical tokamak, LATE (the Low Aspect Ratio Torus Experiment).
AB - Toroidal electron cyclotron resonance (ECR) plasma is an ECR heated plasma in an open toroidal magnetic field. The plasma contains no toroidal current and is used for the pre-ionization and non-inductive startup of a tokamak plasma. To obtain a deeper understanding of the basic properties of the plasmas produced in the spherical tokamak QUEST (Q-shu University Experiment with steady-state Spherical Tokamak), we have developed an optical emission spectroscopy system with multiple viewing chords and have used it to measure the spatial distributions of the toroidal and poloidal flow velocities of C2+ ions. We compare the measured velocities with those calculated from the ion drift equations using the plasma parameters reported for a similar spherical tokamak, LATE (the Low Aspect Ratio Torus Experiment).
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U2 - 10.1585/PFR.13.3402087
DO - 10.1585/PFR.13.3402087
M3 - Article
AN - SCOPUS:85064681666
SN - 1880-6821
VL - 13
JO - Plasma and Fusion Research
JF - Plasma and Fusion Research
M1 - 3402087
ER -